Device for converting rotary into reciprocating motion



(ModeL) 2 Sheets-Sheet 1.

G. A. FULLERTON.

DEVIGE FOR CONVERTING ROTARY INTO BEGIPROGATING MOTION.

Ill

Patented 0ot;'24, 1882.

fiz'uezzizfi v I :12 w

,(ModeL) 2 Sheets-Sheet 2. G. A. FULLERTON.

' DEVICE FOR CONVERTING ROTARY INTO REOIPROOATING MOTION.

Patented Oct. 24, 1882.

UNTTE STATES PATENT Trice.

GEORGE A. FULLERTON, OF BOSTON, MASSACHUSE""S.

DEVICE FOR CONVERTING ROTARY INTO RECIPROCATING MOTION.

SPECIFICATION forming part of Letters Patent No. 266,590, dated October24, 1282.

Application filed September-30,1880. (Model) To all whom it may concern:

Be it known that I, GEORGE A. FULLER- TON, of Boston, in the county ofSuffolk and State of Massachusetts, have invented certain new and usefulImprovements in Devices for Converting Rotary into Reciprocating Motion,of which the following is a specification.

My invention relates to improvements in the devices for convertingrotary into reciprocating motion, in which the pin of a rotating crankreciprocates a cylindrical plug closely filling the interior of a hollowcylinder. The objects of my invention are to improve the de vices forthis purpose patented by Luther Dame, February 11, 1873, No. 135,697, byproviding a continuous lubrication for the crankpin and the cylindricalcore, to afford facilities for the exact adjustment of the mechanism,and to perfect the details thereof.

In the accompanying drawings, Figure l is an elevation, Fig. 2 a plan,and Fig. 3 a lengthwise vertical section, of a machine enibodying myinvention. Fig.4 is a perspective View, full size, of plug b.- Fig. 5 isa section, full size, of the same. Fig. 6 is a perspective view of thejournal, full size.

In machines for setting the edges of boot and shoe soles with areciprocating tool a very rapid reciprocating motion must be given tothe tool to attain the best results. In practice these tools travel fromone end of their path to the other, over four thousand times aminute-that is to say, the tool makes over four thousand starts and overfour thousand stops each minute.

I have shown my mechanism as it is constructed for reciprocating thetool-carrier of an edge-setter.

1n the drawings, A is the carriage; [1, its

40 journal-box, and a itsjournal; (t the box for the cylindrical plug;B, the shaft; 1), the crankpin, and 1) its plu The upper surface of theframe D and the under surface of the cap d, firmly fastened to theframe, form ways for the carriage, as will be clear from the drawings.

The numbered parts need not be here described in detail, as they areespecially adapted for finishing sole-edges, 1 being the tool-holder, 2the finger-rest, and 3 the gas-burner.

The revolution of shaft vB causes the crankpin 1) to move in a circle,and as the crank-pin b enters plug I) that plug is moved not onlysidewise,butalsoendwise. Itsendwise motion simply moves it up and downin its box a but its sidewise motion causes box a to move back andforth, thereby giving the desired reciprocating motion to thetool-holder which is carried by carriage A, of which box a is a part,and as carriage A is journaled at its rear end theboxa must also have aslight motion about the plug 1), and it is for this reason that the plugb must be cylindrical, the distinguishing characteristic of this part ofmyinvention being the use of a crank-pin and plug with a carriage whichisjournaled at its rear end. This necessitates provision for enablingthe box of the plug to move slightly around the plug, for both the box aand its plug 1) oscillate or move over a short are while the end of thecrank-pin 1) moves in a vertical plane. The oscillation of the carriage,as distinguished from its reciprocation in one plane, is a practicalimprovement of great value in machines where the rate of speed is veryhigh, notbe cause there is any substantial difference between the shortare in which the end of the carriage travels and a straight line, butbecause there is far less strain and wear when the carriage oscillatesthan when it reciprocates.

The shaft 13 is made conoidal whereit passes through its boxes, and itsboxes made to correspond in a well-known manner. The sleeve 1) isadjustable on the shaft, (usually by being rapidly. By the firstadjustmcnt'thatis,of 5

sleeve 1) on its sha t-the shaft is adjusted in its boxes with theutmost accuracy; but at the same time the crank-pin b is necessarilypulled a little too far outof its plug 0; but the plug 1) is readilyadjusted with the utmost accuracy on its pin b by adjusting the journala on frame D. The entire adjustment is so simple that it can be readilyand quickly made by the operator of the machine as soon as the leastsigns IOO of wear begin to appear. The holesfare oilholes, and the plugis best made hollow in its upper part to receive an absorbent materialand oil. A spiral groove on the plug 1) is also desirable to distributethe oil between it and its box. The pin 1) is provided with a sleeve, asshown in Fig. 3, which can be readily replaced when worn. The properoiling of the plug is best effected by carrying wicking fromthe'interior to the surface, as shown in Fig. 4, which is a perspectiveView of the plug, and in Fig. 5, which is a section, full size, showinghow the wicking is arranged. This method of oiling the plug and its boxby making the plug itself an oil-cup is new with me.

Thejonrnal a/ is shown in perspectivein Fig. 6, full size. The oil isbest distributed on this journal by means of grooves around it connectedone with the other by connecting,

grooves, as shown.

'1 disclaim of course allthat is described in the Dame patent abovementioned, the main feature of my invention consisting in thearrangement of the carriage on a pivot near its rear end and parallelwith the driving-shaft in connection with the crank-pin and itscylindrical plug revolving in a box near the front end of the carriage.

hat 1 claim as my invention is 1. In combination, pivoted carriage A andshaft B, arranged together, as shown, by means of crank b and plug 1),the pivot on of the carriage being near one end and the box a forplug 1) near the other'end of the carriage, all substantially asdescribed.

2. In combination, carriage A, its journal a, made adjustable,substantially as described, shat'tB, with its eonoidal journals, one ofwhich is adjustable, frame D, with'its eonoidal journal=boXes, crank-pinZ), and plug 1), all sub; stantially as and for the purpose specified.

3. The plug 0, formed with a cavity in its interior for containing alubricant, in combination with its box a substantially as set forth.

GEO. A. FULLERTON.

Witnesses:

J. E. MAYNADIER, J. R. SNOW.

